Support commas in ISO-8601 date/time format for millis

library/src/androidTest/java/com/google/android/exoplayer2/util/UtilTest.java

@@ -142,8 +142,10 @@ public class UtilTest extends TestCase {
   public void testParseXsDateTime() throws Exception {
     assertEquals(1403219262000L, Util.parseXsDateTime("2014-06-19T23:07:42"));
     assertEquals(1407322800000L, Util.parseXsDateTime("2014-08-06T11:00:00Z"));
+    assertEquals(1407322800000L, Util.parseXsDateTime("2014-08-06T11:00:00,000Z"));
     assertEquals(1411161535000L, Util.parseXsDateTime("2014-09-19T13:18:55-08:00"));
     assertEquals(1411161535000L, Util.parseXsDateTime("2014-09-19T13:18:55-0800"));
+    assertEquals(1411161535000L, Util.parseXsDateTime("2014-09-19T13:18:55.000-0800"));
   }
 
   public void testUnescapeInvalidFileName() {

library/src/main/java/com/google/android/exoplayer2/util/Util.java

@@ -94,7 +94,7 @@ public final class Util {
   private static final String TAG = "Util";
   private static final Pattern XS_DATE_TIME_PATTERN = Pattern.compile(
       "(\\d\\d\\d\\d)\\-(\\d\\d)\\-(\\d\\d)[Tt]"
-      + "(\\d\\d):(\\d\\d):(\\d\\d)(\\.(\\d+))?"
+      + "(\\d\\d):(\\d\\d):(\\d\\d)([\\.,](\\d+))?"
       + "([Zz]|((\\+|\\-)(\\d\\d):?(\\d\\d)))?");
   private static final Pattern XS_DURATION_PATTERN =
       Pattern.compile("^(-)?P(([0-9]*)Y)?(([0-9]*)M)?(([0-9]*)D)?"